Messages in this thread | | | Date | Mon, 23 Jun 2014 09:09:51 +0200 | From | Christoph Hellwig <> | Subject | Re: scsi-mq |
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On Sat, Jun 21, 2014 at 12:52:22AM +0000, Elliott, Robert (Server Storage) wrote: > Some of those context switches might be from scsi_end_request(), > which always schedules the scsi_requeue_run_queue() function via the > requeue_work workqueue for scsi-mq. That causes lots of context > switches from a busy application thread (e.g., fio) to a > kworker thread.
Jens has been prodding me to fix this up, I'll send a patch soon that avoids the workqueue unless we need to kick other queues and thus walk the list of LUNs.
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